NASA discovered this star and 7 Earth-size planets around it that could conceivably have water and sustain human life.
As we continue to gobble up Earth's resources and build incredibly powerful weapons that may one day soon destroy it, we need to have a viable Plan B.
Hence, the race to find another planet(s) with resources and environmental conditions where human civilization can survive and thrive.
I'm not sure what is more exciting than finding that magic planetary home of the future, where everything is new and pristine again like the Garden of Eden.
A place to go where hopefully we take not only the bits and bytes of our current world, but also the lessons learned to do it better again. ;-)
(Source Photo: NASA JPL here and here)